Answer
Palladium-118.
Work Step by Step
Uranium has atomic number 92, meaning 92 protons. If it splits evenly, it turns into 2 atoms of palladium, atomic number 46.
U-236 has 236 - 92 = 144 neutrons. Each palladium fragment would have 72 neutrons (144/2). The atomic mass is 46 + 72 = 118. The nuclei are Pd-118.
